No
You either got the wrong master cylinder or you haven't actually bled all the air out of the system.
your brakes are about to give out... you should go to wal-mart and have them replace them
Air in the brake system- Brake system needs to be bleed and fluid needs to be added while you are doing that.
you either need a new brake master cylinder or your brakes need to be bled
They wouldn't. You have a problem, and it's hazardous to your health.
If bleeding rears and bleeder is open and peddle wont go to the floor try a front bleeder to see if you get results. what did you do to have to bleed them?
the brakes or the emrgen see brakes
The brake fluid will be thinner in the summer heat. Check the wheel and master cylinders for any leaks. The leak will let the pedal go to the floor.
broken inner seals on your brake's master cylinder
The brake fluid level might be low in the brake master cylinder in your engine compartment from a leak somewhere , or maybe you have air in the brake line(s) and the brake system needs to have the air blead out
ABS brakes are not spongy. If you have spongy brakes the reason is that there is air in the system. You need to have your brakes bled.